How important is a chin in boxing? Can a boxer with a weak chin make it to the top by having great defense, or is it only a matter of time before he gets KO'd?
pretty important in a sport where by definition you're supposed to get hit in the face. Its not necessary to have a granite chin to get to the top level..but you better have a lot of tools in your arsenal to prevent getting hit clean. Klitschko is a prime example of the above.
Its pretty important, and not just in boxing. It makes up a quarter of ones face, or half of a Lebedev or Kovalev face.
Dam that's as close as I've ever seen you come to a relevant comment but not quite though.... Roger had no chin and was a 3x world champ.... Norton was the HW champ without a great chin (average one ).. Chin - Important attribute yes. Most important attribute, debatable....
As Carl Froch just pointed out why Groves will never be great, A great boxer needs to be a giver & a taker. Grove's Glass Jaw can't take it so he will never be a great. The same goes for GGG. Once he gets in the ring with an A level giver, his Russian glass jaw will be exposed to the world.
After having the cojones to get into the ring/get up off the canvas, a sturdy jaw is probably the most important trait for a boxer. Toughness can bail you out in a big way. One of the best examples - when Tex Cobb outlasted Ernie Shavers.
Everybody just can't take a shot ! Doesn't mean you can't fight it means you can't get hit ! That's when defense is key...